Method of making metal wool.



Patented Nov. 27, I900.

F. W. BUHNE.

METHOD OF MAKING METAL WOOL.

(Application filed Dec. 12, 1899.)

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F. W. BUHNE.

METHOD OF MAKING METAL WOOL.

(Application filed Dec. 12, 1399.)

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W @JMQQ AITWINEYS NITED STATES FRIEDRICH WILHELM BIIHNE, OF FREIBURG,GERMANY.

METHOD OF MAKING METAL WOOL.

ememeerm forming part of Letters Patent No. 662,392, dated November 27,1900. Application filed December 12, 1899. serial No. 740,104. (Nospecimens.)

To all whom it may concern:

Be it known that I, FRIEDRICH WILHELM Bi'IHNE, a subject of the GrandDuke of Baden, and a resident of Freibnrg, in the Grand Duchy of Baden,German Empire, have invented a new and useful method of manufacturingmetal chips, such as used for cleaning floors, grinding and polishingobjects of various kinds, and the like, of which the following is aspecification.

The chips have been produced heretofore by cutting them from thin metalwires or turning them off from metal disks having only the samethickness as the chips to be made. These two methods are not economicaland there result from them chips of but little elasticity. Besides, thechips produced according to these methods have not a sufficientsharpness on account of the smoothness of the surfaces of the rolledmetal.

The object of myinvention is to do away with these disadvantages and toproduce chips of great sharpness and elasticity in a very economicalmanner.

The main feature of my improved method resides in cutting the metal fromwhich the chips shall be produced parallel to its grains, the metalbeing used in the shape of rings or bands which are rotated around ashaft and have such a breadth that not only one but several chips arecut at a time, one close to the other.

For manufacturing chips according to this method, especially for cuttingthem off from the edge of a Wound-up metal ba11d,I prefer to make use ofthe machine illustrated in the accompanying drawings, in which similarnumerals denote similar parts similarly located throughout the severalviews.

The parts on one side of the machine I have marked 3 7 8, &c., whilesimilar parts on the opposite side of the machine I have designated withprime-marks, as 3 7 8, the.

Figure l is a front view, Fig. 2 a side elevation, and Fig. 3 a plan, ofthe machine. Fig. 4 is a detail View of the band in its wound-up form,from which the metal chips are out.

Referring to Figs. 1 to 3, 1 is the woundup band, which is held fast bymovable clamps or clutches 2. When the band rotates, chips will be cutoff by means of cutters 3 and 3, which are arranged at the side or edgeof the band. The term radial as applied to the cutters is meant todescribe the position of the cutters as shown in Fig. 2, in which theworking edges of the cutters 3 extend in the plane of a diameter of thewheel and are therefore radial in relation to the wheel. The cutters arepressed against the band by supports 6 and 6, movable in boxes 7 and 7",and pressed outward by springs 8 and 8. Levers 9 and 9, which hold rolls10 and 10, are connected with the stems 7 of the cutter-supports, andthe rolls l0 and 10 are pressed against a cam-ring 11 by means of thesprings 8 and 8. The ring 11 has the shape of the wound-up band 1 and isfixed to a drum 12. When the drum 12, with the band 1, is rotated bymeans of the driving-wheel l3 and the gears 1415 16 17the cam-shapedring 1l,which is fixed to the drum 12,controls or adjusts the positionof the cutters 3 3 in relation to the edge of the strip by means of therolls 10 and 10 and the levers 9 and 9 and supports 5 and 6. The chipsare cut off the band byand with the whole working surface of the cutters3 and 3. The boxes 7 and 7 of the movable cutter-supports 6 and 6 arearranged on supports 18 and 18 and may be moved in their longitudinaldirection by means of spindles 19 and 19, rotated by the gear-wheels 2021 21 22 22. The movable cutter-supports 6 and (if and the cutters 3 and3, fixed to them, are thus pressed continuously against the band or ring1 until the Whole material of the band has been completely out intochips. The clamps or clutches 2, holding the band or ring 1, move backgradually, according to the thickness of the chip, so that the cutters 3and 3 have always a free working surface. This movement of the clamps 2,the ends of which latter are screw-threaded, is effected by cog-wheels23 and 23, the central bores of which are also screw-threaded, and bythe wheels 24. These last-mentioned wheels 24 pass, one after the otherduring the rotation of the drum 12, a pin 25, and they are thus rotateda little and screw the clamps 2 back.

Of course the drum may be arranged horizontally or inclined, instead ofvertically, and the moving power may be applied either to the drum or tothe cutters.

One of the cutters used is toothed-for instance, that marked 3-and theother smooth,

so that the first knife cuts grooves, while the second knife removes theraised parts remaining between the grooves. Both the material cut outfrom the grooves and the raised part out off from between the groovesyield the metal chips. When a knife or cutter ribbed in such a mannercuts from a wound band 4, as shown in Fig. 4, not from thecircumference, but from the fronts'ide, eac'niudividual cutting edge ofthis ribbed steel cutter must describe a spiral line 5, as in Fig. 4,and consequently the support which carries the knives must be displacedin that sense. This takes place by the assistance of the ring 11, beforedescribed, which is therefore represented helicoidally in Fig. 2-thatis, it isthinner on one side than on the other, asin Fig. 1. w

Hitherto metal chips unless pared or planed ofi from thin wire were madeby turning sheet-metal plates of a thickness to correspond with the chipto be made, It is manifest that on account of the equal smoothness.

of skin on both sides of the plate the chips will be smooth on two sidesand cannot, therefore, be of suffici'ent sharpness. This'is amaterialdrawback.

Having now described my invention, what I desire to secure by LettersPatent of the United States is 1. The method of making metal chipsconsisting in cutting a plurality of chips from the edge of a metal bandin the direction of the grain, the thickness of said band being amultiple of the thickness of the chip, substantially as described.

2. The method of making metal chips consisting in cuttinga plurality ofchips from the edge of a wound-up metal band in the direction of thegrain, the thickness ofsaid band being a multiple of the'thickness of'the chip, substantially as described.

In witness whereof 1 have hereunto set my hand in presence of twowitnesses. I

FRIEDRICH WIL'HELM 'BUHNE.

Witnesses: v

LUDWIG DRE'IER, BENJ. F. L'IE'FE'LD.

